东亚副热带夏季风环流指数及其与中国气候的关系  

THE EAST ASIAN SUBTROPICAL SUMMER MONSOON INDEX AND ITS RELATION WITH CLIMATE ANOMALIES IN CHINA

作　　者：刘宣飞[1] 汪靖[1] 

机构地区：[1]南京信息工程大学气象灾害重点实验室,江苏南京210044

出　　处：《热带气象学报》2006年第6期533-538,共6页Journal of Tropical Meteorology

基　　金：江苏省气象灾害重点实验室(KLME060210)项目资助

摘　　要：采用大气环流正、斜压分解方法,从东亚副热带夏季风为正、斜压混合型季风观点出发,定义并计算了1958-1997年东亚副热带夏季风环流指数。该环流指数与1961-1995年中国160站夏季降水、气温的相关分析表明,它与中国东部夏季降水和气温的关系密切:强季风年,以河套地区为中心的黄河流域及华北地区多雨,长江流域少雨,华南和东南沿海多雨,以长江流域为中心的全国绝大部分地区气温偏高。弱季风年情况相反。此外,还将该环流指数与目前常用的4种东亚夏季风指数进行了对比分析。With 1958 - 1997 NCEP/NCAR reanalysis data and 1961-1995 summer （JJA） rainfall and temperature records of 160 stations in China, a new East Asian subtropical summer monsoon circulation index is defined, in which the barotropic and baroclinic components of the circulation are included. Results show that this index can well indicate the interannual variability of summer precipitation and temperature anomalies in China. A strong monsoon is characterized by more rainfall in the Yellow River basin and northern China, less rainfall in the Yangtze River basin and more rainfall in southern and southeastern China, in association with higher temperature in most areas of China. Furthermore, comparisons are made between the monsoon circulation index proposed in this paper and other monsoon indices for their representation of climate anomalies in China.

关 键 词：东亚副热带夏季风 季风指数 中国气候异常 

分 类 号：P425.42[天文地球—大气科学及气象学]